The Union Memory AH640 256GB NVMe PCIe Gen3 x4 Internal SSD M.2 2280 OPAL is a high-performance solid-state drive designed for use in laptops and PCs. With a storage capacity of 256GB, this SSD offers fast read and write speeds, thanks to its NVMe interface and PCIe connectivity. The green-colored drive is compact, measuring 80mm in length, 22mm in width, and 1.5mm in height. It features a cache of 512MB and is compatible with SSD drive types, making it a reliable choice for storing and accessing your data quickly and efficiently.